diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index ae3626b6d..9e16845f2 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -2356,6 +2356,9 @@ static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc,
                 dstCapacity, ms->window.dictLimit, ms->nextToUpdate);
     assert(srcSize <= ZSTD_BLOCKSIZE_MAX);
 
+    /* Assert that we have correctly flushed the ctx params into the ms's copy */
+    assert(ZSTD_equivalentCParams(zc->appliedParams.cParams, ms->cParams));
+
     if (srcSize < MIN_CBLOCK_SIZE+ZSTD_blockHeaderSize+1) {
         ZSTD_ldm_skipSequences(&zc->externSeqStore, srcSize, zc->appliedParams.cParams.searchLength);
         return 0;   /* don't even attempt compression below a certain srcSize */